How To Install Hardie Board Lap Siding?

How To Install Hardie Board Lap Siding?

Do you need plywood behind Hardie board?

Fiber cement siding should be installed over plywood, OSB, or sheathing. Be sure that the siding installed is dry. Building codes will usually require installing siding over water-resistant barriers and nailed into the studs every 16 or 24 inches.

What nails do you use for Hardie siding?

NAIL TYPE: Fasteners must be corrosion resistant, galvanized or stainless steel. Electro-galvanized nails are acceptable for use with James Hardie Siding Products, but may exhibit premature corrosion. James Hardie recommends the use of quality, hot-dipped galvanized nails.

Do you nail or screw Hardie board?

Fasten HardieBacker sheets with proper nails or screws (as listed in ”Materials Required” in the backer installation instructions) every 8” around the perimeter and all supporting studs. Keep fasteners between 3/8” and 3/4” from sheet edges and 2” in from sheet corners.

How much do you overlap Hardie siding?

Fiber cement siding should be installed 6” or more above the grade level of the house with a 1”– 2” gap between horizontal surfaces like decks, steps, or adjacent roofs. Flash above doors and windows, leaving a ¼” gap between the flashing and siding.

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Does Hardie board need a vapor barrier?

Hardibacker doesn’t need a vapor barrier or waterproofing except you do need to tape and thinset the joints.

Do termites eat Hardie board?

Do Termites Eat Hardie Board? Although termites do eat wood, they cannot get to the wood in Hardie Board siding because of the fiber cement materials throughout the product.

Can you install Hardie plank directly to studs?

HardiePlank ® lap siding can be installed over braced wood or steel studs spaced a maximum of 24″ o.c. or directly to minimum 7/16″ thick OSB sheathing. See General Fastening Requirements.

Can you put screws in hardiplank?

James Hardie Building Products recommends keeping nails or screws at least 3/8 inch from the end of a plank. Drill pilot holes, at each mark, one -quarter to one -half inch deep, to make it easier to insert screws and prevent cracking the siding.

Can I use a framing nailer for Hardie siding?

The answer is, yes. Framing nail guns can be used for siding installation, if the nail being used is long enough to attach the siding firmly to your exterior wood sheathing. You may also find that siding nailers are a few pounds lighter than framing guns.

Does Hardie board crack?

Because Hardie siding is so stiff any movement of the house can cause cracks in the siding which are typical of any rigid masonry product.

Does Hardie board need to be painted?

What is Hardie Plank? Hardie Plank is a newer composite material made of concrete substrate. Hardie Plank is also called fiber cement siding. While it’s far heavier than aluminum, vinyl or wood, it is extremely durable and typically only needs a new paint every ten to twenty years for maintenance.

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How long can Hardie board go unpainted?

Pre-primed products can sit for 6 months without paint. Unprimed hardie can sit for 3 months without paint.

Does siding need to be nailed into studs?

Vinyl siding must never be applied directly to studs without sheathing.

Does Hardie plank expand and contract?

Fiber cement (complying with ASTM C1186), as do all building materials, expands and contracts with changes in relative humidity and temperature. James Hardie recommends designing for this type of movement on buildings with long runs of continuous siding.


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